The "Keystone State" ranks 48th in CO2 emissions from fossil fuel combustion, 49th for particulates in the air, and 49th for toxic exposure.
拱心石之州在化石燃料燃烧产生CO2上排名48，可吸入颗粒排名49，毒素暴露位居49。
Pennsylvania's nickname is the keystone State. Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.
宾夕法尼亚州的别名是“拱心石之州”。就如拱心石支撑起石拱一样，人们认为宾夕法尼亚支撑起了年轻的美利坚共和国。
UGI Utilities, which serves Trimble and homes across the Keystone State, saw a record of more than 5, 500 customers converting to gas in the year that ended in September.
UGI这家为Trimble一家以及宾夕法尼亚州众多家庭提供燃气服务的公司统计，截止到今年九月份有超过5500位用户转向选择了燃气。
UGI Utilities, which serves Trimble and homes across the Keystone State, saw a record of more than 5, 500 customers converting to gas in the year that ended in September.
UGI这家为Trimble一家以及宾夕法尼亚州众多家庭提供燃气服务的公司统计，截止到今年九月份有超过5500位用户转向选择了燃气。
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